Buckling-resistant sucker rod
US10830002B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 19, 2018 |
| Grant date | Nov 10, 2020 |
| Priority date | — |
| Expiry date | Jul 10, 2038 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B43/127
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A Buckling-resistant Sucker Rod for well pumps. The present invention comprises a sucker rod assembly in which the rod itself is held in tension between opposing fittings, and in which a sleeve surrounds the rod, occupying the space between the fittings. In one version, the buckling-resistant rod is assembled such that the end fittings are placed under tension prior to the installation of the sleeve, In another version, the sleeve is designed to be extendable until it places the rod segment under tension by pressing outwardly on the end fittings. Thus, the sleeve, or the combination of the sleeve and its extension, can absorb all compressive forces transmitted through the fittings, while the rod remains in a condition of tension. The invention enhances the efficiency of oil well operation, by using light-weight sucker rods, while minimizing down time due to breakage of the rods.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.